diff --git a/src/index.ts b/src/index.ts
index 21cec43..97f08b5 100644
--- a/src/index.ts
+++ b/src/index.ts
@@ -101,11 +101,11 @@ export class Kepler {
     }
 }
 
-export class Orbit<A extends Authenticator> {
+export class Orbit {
     constructor(
         private url: string,
         private orbitId: string,
-        private auth: A,
+        private auth: Authenticator,
     ) { }
 
     public get orbit(): string {